I used to wonder how I would be able to purchase applications on google play without having a debit card or a Paypal account. Another thing is that some apps were damn expensive. However, after a long time of doing my 'research', I came across an application called blackmart. It is similar to play store except for the fact that every app is free. You heard me right. I came to learn that before apps are uploaded to the Google play store, their beta versions would be tested on blackmart. This helped me a great deal as I now save a lot on apps.